I open Garry's Mod and it says all that 'Preparing to launch Garry's Mod' and it goes to the loading screen, then all of the sudden it just closes with no errors at all. I'm currently running Windows 7 64bit.

I am experiencing a similar problem...but it seems to be a steam problem maybe? It works fine in singleplayer, but I enter my (linux if it matters) server and after a few seconds the game just quits with no error... here is what it says on the server's console

I am experiencing a similar problem...but it seems to be a steam problem maybe? It works fine in singleplayer, but I enter my (linux if it matters) server and after a few seconds the game just quits with no error... here is what it says on the server's console

I have tried restarting steam... validating/defragging game files... even happens on a clean install of gmod. :( any suggestions?

edit: also running windows 7 64bit

Same happening to me and most of my players, Linux server too.

I also got this in steamapps/username/garrysmod (might've been garrysmod/garrysmod, can't remember), not the usual crash dump location and dumps.garrysmod.com says it's not a valid dump file.

I get dropped as soon as I load the game as well. Sure as fuck not appreciating the immediate "lol u cheat" response, but at least I'm not the only one who's been getting hit by this. Wonder what got messed up this time around...

As of right now it seems to purely be a multiplayer problem. As well, both Lazer and I have the same addons and we have not changed or added anything to them in a couple of weeks. The only thing thus far that has changed was your update earlier yesterday, on the 24th. As it was an update for macs, I have no idea how it could have changed anything for us, as we all are running 64bit windows systems.

E: some more clarification, This happens on all multiplayer servers I've connected to, which as of now is about ~20 servers.

Can you run with -condebug and then paste the last few lines of the created console.log? Does it create a dmp file?

Code:

Requesting texture value from var "$basetexture" which is not a texture value (material: gpurt)
Requesting texture value from var "$basetexture" which is not a texture value (material: gpurt)
Requesting texture value from var "$basetexture" which is not a texture value (material: gpurt)
Requesting texture value from var "$basetexture" which is not a texture value (material: gpurt)

The empty lines above it were intentional, they're actually in the console file - seems a bit odd.

Dump file: http://www.mediafire.com/?9b0ude3lnh06qwc
Just as earlier, didn't appear in steam/dumps, it was in steam/steamapps/username/garrysmod instead, also again dumps.garrysmod.com says it isn't a dump file

To clarify, there's two different issues being discussed in this thread:

1) First post had an issue where an addon apparently crashed gmod at startup. OP fixed it by removing and reinstalling all of his addons.

2) There indeed appears to be a bug in which joining a server with ULX as an admin or superadmin causes a crash. We are currently looking into the issue and will get a fix out as soon as we can. You can view the thread about it on our forums here. Please continue discussion there or on a new thread on facepunch, as this thread topic really shouldn't have anything to do with ULX.